We study the Hubbard model on a geometrically-frustrated hyperkagome lattice by a cluster extension of the dynamical mean field theory. We calculate the temperature (T) dependences of the specific heat (C) and the spin-lattice relaxation time (T-1...
We present a scenario for the peculiar coexistence of charge fluctuations observed in quasi-2D 1/4-filled organic conductors theta-(BEDT-TTF)(2)X in the quantum critical regime where the charge ordering is suppressed down to zero temperature. The ...
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 74(11) 2905-2908 2005年11月
We have studied the superconducting state of Sr2RuO4 under a magnetic field parallel to the superconducting plane. We show that due to a weak spin-orbit coupling, a nonunitary k(y)(z - i alpha y) state is formed right at H-c2, which then changes t...
BC" target="_blank">Effects of Fermi surface and superconducting gap structure in the field-rotational experiments: A possible explanation of the cusp-like singularity in YNiBC
Masafumi Udagawa Youichi Yanase Masao Ogata
2004年8月
We have studied the field-orientational dependence of zero-energy density of<br />
states (FODOS) for a series of systems with different Fermi surface and<br />
superconducting gap structures. Instead of phenomenological Doppler-shift<br />
method...
We study the vortex state of a layered superconductor with vertical line<br />
nodes on its Fermi surface when a magnetic field is applied in the ab-plane<br />
direction. We rotate the magnetic field within the plane, and analyze the<br />
change...
We study the collective behavior of Majorana modes in the vortex state of chiral p-wave superconductors. Away from the isolated vortex limit, the zero-energy Majorana states communicate with each other on a vortex lattice, and form a coherent band...
人文科学研究科
理学部